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8069016: Add BarrierSet downcast support

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Add FakeRttiSupport utility and use to provide barrier_set_cast.

Reviewed-by: jmasa, sangheki
This commit is contained in:
Kim Barrett 2015-02-27 19:52:48 -05:00
parent 1426bc9dc1
commit 40d3986051
32 changed files with 289 additions and 131 deletions
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18
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2005, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -1050,16 +1050,12 @@ void PSParallelCompact::post_compact()
bool young_gen_empty = eden_empty && from_space->is_empty() &&
to_space->is_empty();
BarrierSet* bs = heap->barrier_set();
if (bs->is_a(BarrierSet::ModRef)) {
ModRefBarrierSet* modBS = (ModRefBarrierSet*)bs;
MemRegion old_mr = heap->old_gen()->reserved();
if (young_gen_empty) {
modBS->clear(MemRegion(old_mr.start(), old_mr.end()));
} else {
modBS->invalidate(MemRegion(old_mr.start(), old_mr.end()));
}
ModRefBarrierSet* modBS = barrier_set_cast<ModRefBarrierSet>(heap->barrier_set());
MemRegion old_mr = heap->old_gen()->reserved();
if (young_gen_empty) {
modBS->clear(MemRegion(old_mr.start(), old_mr.end()));
} else {
modBS->invalidate(MemRegion(old_mr.start(), old_mr.end()));
}
// Delete metaspaces for unloaded class loaders and clean up loader_data graph